Burner for fluid fuel.



- .PATBNTED JULY 12, 1904.

G. MODRK. BURNER FOR FLUID FUEL.

APPLICATION FILED FEB. 26, 1904.

N0 MODEL.

Lil

Paten'ted July 12, 1 904%.

GEORGE MOORK', OF CHICAGO ,iLLINoIs, ASSIGNOR OF ONE-THIRD To WILLIAM R.RUMMLER, OF CHICAGO, ILLINOIS.

BURNER FOR FLUlD FUEL.

SPECIFICATION forming part of Letters Patent N 0. 764,860, dated July 121904.

Application filed February 26, 1904. Serial No. 195,455 (No model.)

To all, whom, it may concern.-

Be it known that I, GEORGE MooRK, a citizen of the United States'ofAmerica, and aresident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Burnersfor Fluid Fuel, of which the following is aspecification.

My invention relates to burners for fluid gaseous and liquid) fuel. 7 IIn the common forms of burners either the gas or the air, or both, areof such low tem perature at the time of mixture and at the time ofignition that much of the gas passes through the flame without perfectcombustion.

The main objects of my invention are to provide an improved structurefor burners for fluid fuel and to provide means for increasing theefficiency of such burners by thoroughly mixing the fuel with air andrapidly andhighly heating such mixture during its passage throughtheburner, so as to cause a complete combustion of the fuel atits deliveryfrom said burner.

I accomplish these objects by the device shown in the accompanyingdrawing, which represents a vertical section of a gas-burner constructedaccording to my invention.

1n the construction'shown the burner consists of a cylindrical shellorcasing 1 open at its upper end and having an inner wall or tu-'hularpart 2 extending upwardly throughits bottom concentrically withitsside walls 3. The part 2 is open both at the top and the bottom andis provided at its lower end with a bell-shaped mixer 4, having agas-pipe 5 arranged concentrically of its air-inlet 6. A cylindricalhood or inverted shell 7 extends across the upper end of the tubularpart 2 and down- Wardly around the side walls of the part 2 and withinthe walls 3 of the casing. The space 8 within the hood 7 and surroundingthe mixing-chambei 9 is considerably greater in transverse area than thespace 10 between the walls of said hood and casing. so that gasesentering the space 8 from the mixing-chamber will tend to form eddiesand be delayed in their passage from the interior of the casing. Thehood 7 is supported within the casing 1 by means of a plurality ofset-screws 11, which extend through the side walls 3 of the casing thecasing.

The operation .of the device shown is as follows: Gas is delivered, fromthe service-pipe, at the fuel-inlet 13 of the mixer by means of the pipe5 and is there mixed with air enter-,

ing the .mixer at the sides of said fuel-inlet. The mixed air and gasespass upwardly through the mixing-chamber against the inside of theheating-surface 1 5 and then downwardlythrough the space 8 within thehood, where the expanded gas and air are more thoroughly mixed. Themixture is finally discharged at 14 at the upper end of the casing. Thedirection of flowot' gasis indicated by the arrows in the drawing. Whenthe gas escaping at 14 is ignited, additional air is taken up from thesurrounding atmosphere. The rushing in of such additional air causes theflame to assume a conical form above the top of the hood 7 and causessuch flame to play against the upper part of the walls of said hood. Thehood 7 being formed of a good conductor ofheat, such as iron or brass,rapidlybecomes heated through the action of such flame, and the mixedgas and air, playing against the inner face of the heating-surface 15and then passing downwardly and up wardly through the along the hot sidewalls of the hood 7, becomes rapidly and thoroughly heated, so that whenit-reaches the flame at 14 all of its constitu ents are incondition beentirely-consumed.

When a liquid fuel is burned, the fuel-in-.

passages 8 and 10 and v to burst into flame and let 13 will be muchsmaller, so that the fuel will enter themixer in the form of a finespray and be atomized by the" air, entering the'in- -lets 6.- In otherrespects the operation and structure-of the device will the same asshown.

It will be seen that some of the details of be substantially.

the construction shown may be altered without departing from the spiritof my invention. What I claim as my invention, and desire to secure byLetters Patent, is'- 1. A burner comprising an outershell closed atpthe"bottom and open at the top; a second I shell of lessdia'meter closedatthe top and open,- at the bottom-and secured within'the outer shell;'athird shell, of less diameter than the second, extending from thebottom of the outer shell upwardly'within the second she'll, openinginto said second shell near the top, and having I an inlet for receivingfluid fuel 'fromthe service-pipe and a separate inlet,

for air; said shells being adapted to convey the'mix'ture of'airflandfluid fuel between the walls and discharge the same near the top of andagainst the outside of the second" shell,

'andadapted, when the mixture is ignited at the discharge end, to causethe flame to play directly upon said second shell for rapidly and highlyheating the mixture in the second shell,

I substantially as described.

2. ,A-burner comprising an outer shell closed at-the bottom and open atthe top; a second shell of less diameter closed at the top and open p atthe bottom and secured within the outer shell; a third shell, of lessdiameter than the second, extending from the bottom of the second andouter shells, and said shells being adapted to convey the mixture of airand fluid fuel between the walls and discharge the same near the top ofand against the outside of the second'shell, and adapted, when themixture is ignited at, the discharge end, to cause the flame to playdirectlyupon said second shell for rapidly and highly heating themixture in thesecond shell, substantially as described. 3. A burnercom'prisingan outer'shell closed at the bottom and openat thetop; asecond shell of less diameter closed at the top and open at the bottomand secured within the outer shell; a third shell, of less diameter thanthe second, extending from the bottom of the outer shell upwardly Withinthe second shell, opening into said second shell near the top, andhaving at its lower end an inlet for fluid fuel I and an air-inlet; saidshells being adapted to convey the mixture of air and fluid fuel between the walls and discharge the same near the top of and against theoutside of the second shellgand adapted, when the-mixture is ig nited atthe discharge end, to cause the flame to play' directly upon 'saidsecond shell for 4. A burner comprising an outer'shell having a doublewall with the space therein closed at "the bottom and open at the top,an inverted shell open at the bottom and closed at'the top by a singleheat-conducting wall and having its side walls extending down into thespace in said double wall, the outer she'll having at its lower end,inward of the double wall, an inlet for fluidfuel and an air-inlet; saidshells being adapted to convey the mixture of air end fuel against theinside of the top of the iHYBI'tBd shell, thence downwardly in thedouble wall and back to the outside of the upper part of the invertedshell, whereby, when the gas is ignited at' the outer upper'part of theinverted shell, the flame will play directly against said-heat-condnoting wall and the mixture within said upper partwill' become rap idlyheated, substantially as described.

5. A burner comprising an'outer shell closed at the bottom and open atthe top; a second shell of less diameter closed at the top and open atthe bottom and secured within the outer shell," a third shell, ofless'diameter than the second, extending from the bottom of the outershell upwardly within the-second shell, opening into said second shellnear the top, and having at its lower end an inlet for fluid fuel and anair-inlet; the spacebetween the side walls of the second and thirdshells being of greater area than the space between the side walls ofthe second and outer shells, and said'shells being adapted to convey themix ture of air and fluid fuel between the walls and discharge the samenear the top of and against the outside of the second shell, andadapted,- when the ,mixture is ignited at the discharge end, to causethe flame to play directly upon said second shell for rapidly and highlyheating the mixture in the second shell, substantially as described;

Witnesses:

WM. it. RUMMLER, GLEN C. STEPHENS.

Signed at Chicago 18th day of January,

